A precast segmental beam lifting device

Abstract

The application relates to the field of hoisting equipment, in particular to a precast segment beam lifting hoist, which comprises a lifting hoist installed at the two ends of a portal crane jib arm, the lifting hoist comprises a cross beam extending in the transverse direction and fixedly connected with the jib arm, the two ends of the top of the cross beam are provided with hanging components, the hanging components are composed of sliding seats, rod frames and locking structures, the sliding seats are fixed with the cross beam, the top of each sliding seat is provided with a horizontal plane, the top of each rod frame is provided with a rolling assembly matched with the sliding seat, the locking structure is used for locking the rod frame and the sliding seat, and the bottom of each rod frame is provided with a lifting rod. The lifting hoist hanging interval can be flexibly adjusted, different specifications of precast segment beams can be hoisted, and the structure design is reasonable and convenient to operate.

Description

Technical Field

[0001] This application relates to the technical field of hoisting, and in particular to a lifting device for precast segmental beams. Background Technology

[0002] Segmental beam construction technology has wide applications in municipal bridge engineering, intercity rail transit engineering, and other fields. This technology divides a whole box girder into several segments, prefabricates them in a prefabrication yard, and then transports them to the bridge site by road for erection. This greatly improves construction efficiency, promotes the development of bridge construction projects, and makes bridge construction more efficient and orderly, better adaptable to different geographical environments and traffic demands. At the same time, it also saves time and costs for related projects, promoting the continuous optimization of infrastructure construction in these fields. The development of segmental beam construction technology has driven the advancement of related supporting facilities and technologies in prefabrication yards, making the entire industry chain more mature and complete.

[0003] During the on-site handling of precast segments, the design of lifting hole positions often needs to be adjusted due to different beam types. Traditionally, adjusting the lifting hole positions usually involves on-site lifting equipment supplemented by manual operation. Specifically, workers lift the frame section, first dismantle the lifting rod, remove the pin, then manually lift the frame to the corresponding hole position on the crossbeam, and finally insert the pin. This method, relying on manpower and simple mechanical assistance, is a common approach and is widely used in many similar lifting operations.

[0004] However, existing methods for adjusting the position of the lifting device have significant drawbacks. The lifting frame has a certain weight, and the entire adjustment process takes a considerable amount of time, which is not only extremely wasteful of manpower, but also carries the risk of the lifting frame falling during operation, potentially injuring workers and threatening their personal safety on site. Utility Model Content

[0005] To overcome the above-mentioned technical problems, this application provides a precast segmental beam lifting device.

[0006] The technical solution for a precast segmental beam lifting device provided in this application is as follows:

[0007] A precast segmental beam lifting device includes a crossbeam extending laterally and fixedly connected to a boom. Hanging components are provided at both ends of the top of the crossbeam. Each hanging component includes a sliding seat, a rod frame, and a locking structure. The sliding seat is fixedly connected to the crossbeam and has a horizontal plane at its top. The rod frame has space for the crossbeam to pass through, and a rolling assembly that engages with the top of the sliding seat is provided at its top. The locking structure locks the rod frame and the sliding seat together. A lifting rod is provided at the bottom of the rod frame.

[0008] By adopting the above technical solution, the rolling component at the top of the boom engages with the horizontal plane at the top of the sliding seat, allowing the boom to move on the sliding seat. This facilitates the adjustment of the boom hole position, eliminating the need for manual lifting of the boom for hole adjustment as before, saving manpower, and avoiding the risk of the boom falling and injuring workers. The locking structure can lock the boom and the sliding seat together, ensuring the stability of the lifting device during use.

[0009] Optionally, the rolling assembly includes a roller frame and an idler roller, the roller frame being fixedly connected to the top of the rod frame, and the idler roller having a longitudinally extending roller shaft and being rotatably connected to the roller frame along its own axial direction.

[0010] By adopting the above technical solution, the pole can roll on top of the sliding seat with the help of rollers, avoiding the need for manual lifting of the pole in the traditional method, saving manpower, improving efficiency, and reducing the risk of the pole falling and injuring the workers.

[0011] Optionally, a 25 / 47 tapered roller bearing is provided between the roller shaft of the idler roller and the roller frame.

[0012] By adopting the above technical solutions, tapered roller bearings can withstand larger radial and axial loads, ensuring that the idler rollers rotate stably and smoothly on the roller frame. This improves the efficiency and stability of the roller frame rolling on top of the sliding seat, thereby increasing overall operating efficiency. Secondly, tapered roller bearings have relatively low rolling friction resistance, which helps reduce energy loss and frictional wear, thus extending the service life of the idler rollers and roller frames and reducing maintenance costs.

[0013] Optionally, the rolling assembly further includes a limiting baffle, which is located at the top of the sliding seat at the end away from the boom.

[0014] By adopting the above technical solution, the limiting baffle is set on the top of the sliding seat away from the boom as part of the rolling assembly, which can prevent the rod from slipping off the sliding seat during the rolling process and ensure safety when adjusting the position of the lifting tool hole.

[0015] Optionally, the locking structure includes a positioning moving pin hole, a plurality of positioning fixed pin holes, and a pin shaft. The positioning fixed pin holes extend longitudinally and are spaced laterally on the sliding seat. The positioning moving pin holes are located on the rod frame for cooperating with the positioning fixed pin holes. The pin shaft is used to simultaneously pass through the positioning moving pin hole and one of the plurality of positioning fixed pin holes.

[0016] By adopting the above technical solution, a locking structure is formed by using a positioning moving pin hole, multiple positioning fixed pin holes and a pin shaft, which can lock the rod frame and the sliding seat together.

[0017] Optionally, the hanging components are symmetrically arranged relative to the boom, and the number of positioning pin holes is four. The positioning pin holes include a first pin hole, a second pin hole, a third pin hole, and a fourth pin hole. The distance between the first pin holes in the two sets of hanging components is 750mm, the distance between the second pin holes in the two sets of hanging components is 1100mm, the distance between the third pin holes in the two sets of hanging components is 1300mm, and the distance between the fourth pin holes in the two sets of hanging components is 1600mm.

[0018] By adopting the above technical solution, the symmetrical arrangement of the lifting components of the beam lifting device can ensure the force balance during lifting, and the setting of four different spacing positioning pin holes can meet the needs of different lifting hole positions for various beam types.

[0019] Optionally, the sliding seat is provided with a weight-reducing groove extending laterally.

[0020] By adopting the above technical solution, a weight-reducing groove extending laterally is provided on the sliding seat, which can reduce the weight of the sliding seat while ensuring structural strength.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The top of the pole frame is equipped with a rolling component, which allows the pole frame to slide on the sliding seat, eliminating the need to lift the pole frame to the corresponding hole position on the crossbeam, thus saving manpower;

[0023] 2. The limit baffle can prevent the pole from falling and injuring workers during the adjustment process, thus improving operational safety;

[0024] 3. It reduces the time required for adjusting the lifting tool hole position, eliminating the need for at least 30 minutes of adjustment time and improving work efficiency. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of the precast segmental beam lifting device provided in the embodiments of this application.

[0026] Figure 2 This is a schematic diagram of the structure of the precast segmental beam lifting device and the boom provided in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 1-lifting boom; 2-crossbeam; 3-sliding seat; 301-first fixed pin hole; 302-second fixed pin hole; 303-third fixed pin hole; 304-fourth fixed pin hole; 305-limiting baffle; 306-weight reduction groove; 4-rod frame; 401-roller frame; 5-support roller; 6-lifting rod; 7-precast segment beam lifting device. Detailed Implementation

[0028] During the on-site handling of precast segments, the design of hoisting holes needs to be frequently changed due to the different types of beams.

[0029] The traditional method for adjusting the position of the lifting tool is as follows: using on-site lifting equipment and manual labor to lift the pole frame, removing the lifting rod, and then using a combination of lifting equipment and manual labor to lift it to the corresponding position, inserting the pin. The pole frame weighs 230kg, and the whole process takes at least 30 minutes, which is extremely wasteful of manpower and carries the risk of falling and injuring workers.

[0030] Traditional lifting tool installation methods have the following disadvantages:

[0031] First, it is inefficient. The entire process takes at least 30 minutes. Besides the transport from the beam fabrication area to the adjustment area, from the adjustment area to the storage area, between the upper and lower levels of the storage area, and between the three sub-areas, the beams also need to be lifted onto the transport vehicle. The lifting time directly impacts the efficiency of each process. The operation steps are relatively cumbersome, increasing the number of steps and reducing labor efficiency.

[0032] Secondly, it is physically and mentally taxing. The pole weighs 230kg, and it takes at least 30 minutes for two people to lift it with the help of the lifting equipment. In addition, one person operates the gantry crane and another person inserts and removes the pins, which not only consumes physical strength but also greatly reduces labor efficiency.

[0033] Thirdly, there are safety risks. The handling process requires close cooperation between operators. If the lifting and lowering are not coordinated properly, it may result in difficulties in alignment and repositioning, or even injury to the operators, posing a safety risk.

[0034] Therefore, there is an urgent need for a precast segmental beam lifting device with easily adjustable lifting holes.

[0035] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0036] This application discloses a lifting device for precast segmental beams.

[0037] like Figure 1 and Figure 2 As shown, the precast segmental beam lifting device 7 includes a crossbeam 2 and hanging components located at both ends of the top of the crossbeam 2. The crossbeam 2 extends laterally and is fixedly connected to the boom 1 of the gantry crane. The crossbeam 2 plays a crucial role in support and connection. It extends laterally and is firmly fixed to the boom 1, providing a stable foundation structure for the entire lifting device.

[0038] The top two ends of the crossbeam 2 are equipped with hanging components. The hanging components can be adjusted in position according to actual needs to adapt to the hoisting holes of different beam types.

[0039] like Figure 1 and Figure 2As shown, specifically, the hanging components include a sliding seat 3, a rod frame 4, and a locking structure. The sliding seat 3 is fixedly connected to the crossbeam 2, and its top has a horizontal plane, which provides a good sliding base for the rolling assembly described later. The rod frame 4 has space for the crossbeam 2 to pass through, a design that allows the rod frame 4 to slide along the crossbeam 2. The top of the rod frame 4 is equipped with a rolling assembly that mates with the top of the sliding seat 3. This rolling assembly includes a roller frame 401 and a support roller 5, with the roller frame 401 fixedly connected to the top of the rod frame 4. The roller shaft of the support roller 5 extends longitudinally, and the support roller 5 is rotatably connected to the roller frame 401 along its own axis. This structural design allows the rod frame 4 to reciprocate on the sliding seat 3 with the help of the support roller 5, reducing friction and thus improving adjustment efficiency. In practical applications, the roller frame 401 can be made of high-strength metal material to ensure sufficient strength and stability. The support roller 5 can be made of a smooth-surfaced, wear-resistant material to reduce friction and extend service life. The idler roller 5 is connected to the roller frame 401 by bearing connection. In this embodiment, a 25 / 47 tapered roller bearing is used. This type of bearing can withstand large radial and axial loads to ensure the stable rotation of the idler roller 5.

[0040] The rolling assembly also includes a limiting baffle 305, which is located at the top of the sliding seat 3 away from the boom 1. The limiting baffle 305 prevents the boom 4 from sliding off the sliding seat 3 during sliding, further improving the safety and stability of the lifting beam. The limiting baffle 305 can be welded to the sliding seat 3 to ensure its firmness and reliability. The limiting baffle 305 can be made of the same or similar material as the sliding seat 3, such as high-strength steel plate, to ensure sufficient strength and impact resistance.

[0041] The bottom of the frame 4 is equipped with a lifting rod 6, which is used to connect with the lifting holes of the precast segmental beam to realize the lifting operation of the precast segmental beam. The lifting rod 6 is usually made of high-strength steel to ensure that it can withstand the weight of the precast segmental beam.

[0042] like Figure 1 and Figure 2As shown, the locking structure is used to lock the rod frame 4 and the sliding seat 3 together. It includes a positioning moving pin hole, multiple positioning fixed pin holes, and a pin shaft. The positioning fixed pin holes extend longitudinally and are spaced laterally on the sliding seat 3. The positioning moving pin holes are located on the rod frame 4 to cooperate with the positioning fixed pin holes. When the rod frame 4 slides to a suitable position, the pin shaft passes through one of the positioning moving pin holes and multiple positioning fixed pin holes simultaneously, thereby locking the rod frame 4 and the sliding seat 3. The number of positioning fixed pin holes can be set according to actual needs. In this embodiment, the hanging components are symmetrically arranged relative to the boom 1, and the number of positioning fixed pin holes is four, namely the first fixed pin hole 301, the second fixed pin hole 302, the third fixed pin hole 303, and the fourth fixed pin hole 304. The spacing between the first fixed pin holes 301 in the two sets of hanging components is 750mm, the spacing between the second fixed pin holes 302 is 1100mm, the spacing between the third fixed pin holes 303 is 1300mm, and the spacing between the fourth fixed pin holes 304 is 1600mm. This arrangement of fixed pin holes with varying spacing can meet the hoisting hole requirements of various beam types. The pins can be made of high-strength alloy steel to ensure sufficient strength and toughness, preventing breakage during use.

[0043] In addition, the sliding seat 3 is provided with a weight-reducing groove 306 extending laterally. The weight-reducing groove 306 reduces the weight of the sliding seat 3 without significantly affecting its structural strength, thereby reducing the overall weight of the lifting beam and saving energy consumption. The shape of the weight-reducing groove 306 can be rectangular, trapezoidal, etc., and its size and shape can be reasonably designed according to the specific dimensions and strength requirements of the sliding seat 3.

[0044] The implementation principle of the precast segmental beam lifting device in this embodiment is as follows: the rolling assembly enables the easy sliding of the rod 4 on the sliding seat 3, greatly improving the efficiency of the lifting device's hole adjustment. Compared with the traditional manual lifting method, it saves a lot of manpower and time, and reduces the labor intensity of workers. The setting of the limiting baffle 305 increases the safety of the lifting device. During the sliding adjustment of the rod 4's hole position, even if the operator accidentally over-operates, the limiting baffle 305 can block the rod 4, preventing it from sliding off the sliding seat 3, thus avoiding equipment damage and personnel injury accidents that may be caused by the rod 4 slipping off. The positioning pin holes with different spacing can adapt to the lifting needs of various beam types, enhancing the versatility and applicability of the lifting device.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precast segmental beam lifting device, located at both ends of the boom (1) of a gantry crane, characterized in that, include: A crossbeam (2) extends laterally and is fixedly connected to the boom (1). The top two ends of the crossbeam (2) are respectively provided with hanging components. The hanging components include a sliding seat (3), a rod frame (4) and a locking structure. The sliding seat (3) is fixedly connected to the crossbeam (2). The top of the sliding seat (3) has a horizontal plane. The rod frame (4) has space for the crossbeam (2) to pass through. The top of the rod frame (4) is provided with a rolling assembly that cooperates with the top of the sliding seat (3). The locking structure is used to lock the rod frame (4) and the sliding seat (3) together. The bottom of the rod frame (4) is provided with a hanging rod (6).

2. The precast segmental beam lifting device according to claim 1, characterized in that, The rolling assembly includes a roller frame (401) and a roller (5). The roller frame (401) is fixedly connected to the top of the rod frame (4). The roller shaft of the roller (5) extends longitudinally and the roller (5) is rotatably connected to the roller frame (401) along its own axis.

3. The precast segmental beam lifting device according to claim 2, characterized in that, A 25 / 47 tapered roller bearing is provided between the roller shaft of the idler roller (5) and the roller frame (401).

4. The precast segmental beam lifting device according to claim 2, characterized in that, The rolling assembly also includes a limiting baffle (305), which is located at the top of the sliding seat (3) away from the boom (1).

5. The precast segmental beam lifting device according to claim 2, characterized in that, The locking structure includes a positioning moving pin hole, multiple positioning fixed pin holes and a pin shaft. The positioning fixed pin holes extend longitudinally and are spaced laterally on the sliding seat (3). The positioning moving pin holes are located on the rod frame (4) for cooperating with the positioning fixed pin holes. The pin shaft is used to pass through the positioning moving pin hole and one of the multiple positioning fixed pin holes at the same time.

6. The precast segmental beam lifting device according to claim 5, characterized in that, The hanging components are symmetrically arranged relative to the boom (1). There are four positioning pin holes, including a first positioning pin hole (301), a second positioning pin hole (302), a third positioning pin hole (303), and a fourth positioning pin hole (304). The distance between the first positioning pin holes (301) in the two sets of hanging components is 750mm, the distance between the second positioning pin holes (302) in the two sets of hanging components is 1100mm, the distance between the third positioning pin holes (303) in the two sets of hanging components is 1300mm, and the distance between the fourth positioning pin holes (304) in the two sets of hanging components is 1600mm.

7. The precast segmental beam lifting device according to claim 1, characterized in that, The sliding seat (3) is provided with a weight-reducing groove (306) extending laterally.

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